In Japan the disease of rice seedling plants called “bakanaebyo” (foolish seedling disease) was known before the advent of modern science. In this disease the height of rice plants is taller than healthy ones and the color of the leaves becomes yellowish green and they are often withered. The disease has been shown to be caused by the fungal infection of a plant pathogen, Gibberella fujikoroi (sometimes, Fusarium moniliforme is used).